People looked at the America that Reagan took over. An America that had lost its optimism and had a dim view of the future and see how Reagan improved it and brought us back
People will look at the America Trump took over. How divisive Trump has been, how he has destroyed our international reputation, the impact of his war in Iran and the shape of the Trump economy. They will see lasting damage
A reminder that it was a previous Democrat POTUS/Admin. that produced that 'lost optimism' & 'dim view of the future'. Also Reagan was subject at the time of much derision from the Left, ridicule, lambasted for offending our "friends and allies", and disparaged for the foreign wars/conflicts he got the USA involved with.
As usual, hindsight can be more generous and approving that the "present" of the past was.
Trump in many was is performing the same game plan as Reagan, only with slightly different opponents(targets)/objectives and improved tools.
The "destroyed international reputation" is with nations that have a more socialist structure and opposing ideals than the traditional ones of the USA. They also resent that Trump has ended the generous handouts and is expecting most of the world to pay their own way and carry their own load. No more "Let George(Washington DC) do it.
The "war in Iran" is still a process in the making towards a better peace, and solutions for an international threat that has been in the making for decades, and his continuing a heritage and agenda of past 1400 years is not something that could be fixed/aborted in a few weeks or a couple of months. Assuming one wants a more permanent solution rather than the usual quick, temporary fix.
The economy is based on a number of factors (often competing with each other) that are not under control of the Executive Branch of USA Federal Guv'mint. For example, reportedly the USA is pumping enough of our own petroleum to meet our nation's needs, so one would expect gas prices(etc.) should have been unaffected by the war's impact on international petroleum markets. But would seem that "Big Oil", who really sets the price at the gas station pump, has decided that the US Citizen will pay for the impact on the rest of the world petroleum market.
I doubt we will see "lasting damage" unless major players decide that's how They want things to be. Our Nation's history has shown us to be resilient and able to bounce back from worse past examples, so your pessimism is premature and out of place, IMO.